[8.x] Fulltext index for PostgreSQL (#39875)

* fulltext index support for PostgreSQL

* use fluent language declarationgs

Co-authored-by: Taylor Otwell <[email protected]>

Author: tpetry

src/Illuminate/Database/Schema/Grammars/PostgresGrammar.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Fluent;
+use RuntimeException;
 
 class PostgresGrammar extends Grammar
 {
@@ -176,6 +177,31 @@ public function compileIndex(Blueprint $blueprint, Fluent $command)
         );
     }
 
+    /**
+     * Compile a fulltext index key command.
+     *
+     * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
+     * @param  \Illuminate\Support\Fluent  $command
+     * @return string
+     *
+     * @throws \RuntimeException
+     */
+    public function compileFulltext(Blueprint $blueprint, Fluent $command)
+    {
+        $language = $command->language ?: 'english';
+
+        if (count($command->columns) > 1) {
+            throw new RuntimeException('The PostgreSQL driver does not support fulltext index creation using multiple columns.');
+        }
+
+        return sprintf('create index %s on %s using gin (to_tsvector(%s, %s))',
+            $this->wrap($command->index),
+            $this->wrapTable($blueprint),
+            $this->quoteString($language),
+            $this->wrap($command->columns[0])
+        );
+    }
+
     /**
      * Compile a spatial index key command.
      *
@@ -359,6 +385,18 @@ public function compileDropIndex(Blueprint $blueprint, Fluent $command)
         return "drop index {$this->wrap($command->index)}";
     }
 
+    /**
+     * Compile a drop fulltext index command.
+     *
+     * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
+     * @param  \Illuminate\Support\Fluent  $command
+     * @return string
+     */
+    public function compileDropFulltext(Blueprint $blueprint, Fluent $command)
+    {
+        return $this->compileDropIndex($blueprint, $command);
+    }
+
     /**
      * Compile a drop spatial index command.
      *

tests/Database/DatabasePostgresSchemaGrammarTest.php

@@ -262,6 +262,36 @@ public function testAddingIndexWithAlgorithm()
         $this->assertSame('create index "baz" on "users" using hash ("foo", "bar")', $statements[0]);
     }
 
+    public function testAddingFulltextIndex()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->fulltext('body');
+        $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertSame('create index "users_body_fulltext" on "users" using gin (to_tsvector(\'english\', "body"))', $statements[0]);
+    }
+
+    public function testAddingFulltextIndexWithLanguage()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->fulltext('body')->language('spanish');
+        $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertSame('create index "users_body_fulltext" on "users" using gin (to_tsvector(\'spanish\', "body"))', $statements[0]);
+    }
+
+    public function testAddingFulltextIndexWithFluency()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->string('body')->fulltext();
+        $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
+
+        $this->assertCount(2, $statements);
+        $this->assertSame('create index "users_body_fulltext" on "users" using gin (to_tsvector(\'english\', "body"))', $statements[1]);
+    }
+
     public function testAddingSpatialIndex()
     {
         $blueprint = new Blueprint('geo');